45 加法 12 等于多少?
45 + 12 = 57
45加法12 等于 57
竖式演算
验算
- 用减法验算:57 − 12 = 45
- 用减法验算:57 − 45 = 12
相关题目
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44 + 12 = 56
46 + 12 = 58
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